The custom calibration procedure varies depending on whether the unit has
been set to concentrations (ppm or mg/m
3
) or volumetric leak rates (cc/sec
or g/yr).
6.3 Custom calibration (concentration units)
CAUTION: BENDING OF THE PROBES
Risk of damage to the equipment. Do not bend the probes. The accuracy of the
Phoenix Mobilis will be affected.
Note:
Do not pressurise the sample bag when you do the calibration, it will cause
significant errors in the calibration.
Read the instructions below before calibrating the Phoenix Mobilis. The
following procedure should be followed if the Phoenix Mobilis has been set
to concentrations (ppm or mg/m
3
).
Table 6 Calibration of the Phoenix Mobilis (concentration units)
Procedure
Image
1. Fill an empty (uncontaminated) sample bag with
5000 ppm helium gas before you start the calibration
procedure.
2. Remove the outer grey probe cover from the
Phoenix Mobilis.
3. Select the calibration procedure on the main menu
(see
Phoenix Mobilis keypad
on page 15).
4. Select custom cal by using the up or down key to
move the lick to icon and press the enter key.
5. An option appears to allow different concentrations
of helium tracer in the test gas.
6. The Phoenix Mobilis can accommodate
concentrations between 4900 and 5100 ppm helium.
7. Press the up or down keys to select the correct
concentration and press the enter key.
8. Make sure that the Phoenix Mobilis is in clean air
and press enter key. The Instrument will take a few
seconds to zero and then the ready screen will appear.
300956073_C0 - 03/2021 - © Leybold
22
Maintenance
